<?php
namespace Factory;
/**
 * Created by PhpStorm.
 * User: cy
 * Date: 18-2-8
 * Time: 上午11:27
 * 数据库操作接口
 */
interface Database
{
    public function add();//增
    public function delete();//删
    public function update();//改
    public function select();//查

}